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🇺🇸 USA equivalent of

431 / X17CrNi16-21.4057

AISI 431S43100REF

Standard: AISI · Source: ASTM A276

Very close match

Other international equivalents

CountryStandardGradeMatch
🇪🇺EuropeENX17CrNi16-2100%
🇯🇵JapanJISSUS43197%